docker/docker-registry — pull request #716 by stevvooe (2014-11-11 21:19:49+00:00)
Title: Replace StorageLayer.CurrentSize interface call with Stat

To support single-flight Size and ModTime queries against backend storage file,
we are replacing the CurrentSize call with a Stat call. This commit only
contains the changes to the interface methods. More work needs to be done to
update the storage drivers, but it may be non-trivial. This change should be
completed before releasing the initial version of storage driver extension
interface.